I was getting the following error when trying to use Plesk’s backup function:
ERROR Unable to open /opt/psa/var/apspkgarc/archive-index.xml
The solution is to visit the “Application Vault” under the “Server” tab of your Plesk interface. The file gets auto-generated at that point.
For more information on how to use Plesk’s backup feature, read this post
Simply run
dscacheutil -flushcache
in the Terminal. (/Applications/Utilities/Terminal.app)
If you are running a version of Mac older than Leopard, such as 10.3 Panther, or 10.4 Tiger, the command is a little different:
lookupd -flushcache
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First off, install MacPorts, with some additional instructions here.
Then open up the Terminal (/Applications/Utilities/Terminal.app) and type:
sudo port install ntop
Notice: It will take a LONG time even on good hardware (about 10 minutes on my Mac Pro with a striped RAID boot array).
After that is complete, you can then launch it by running:
sudo ntop -d
which launches it in daemon mode so that you can close your terminal and still have it running in the background.
It should prompt you to enter the admin password, which has to be 5 characters or more. Type it again to confirm, and it should launch.
Notice that if you do not run it with sudo, you may receive this message:
mac-pro:~ ryebread$ ntop
Fri Dec 19 10:57:15 2008 NOTE: Interface merge enabled by default
Fri Dec 19 10:57:15 2008 Initializing gdbm databases
Fri Dec 19 10:57:15 2008 **ERROR** ....open of /opt/local/var/ntop/prefsCache.db failed: File open error
Fri Dec 19 10:57:15 2008 Possible solution: please use '-P '
Fri Dec 19 10:57:15 2008 **FATAL_ERROR** GDBM open failed, ntop shutting down...
Fri Dec 19 10:57:15 2008 CLEANUP[t2687149856]: ntop caught signal 2 [state=2]
Fri Dec 19 10:57:15 2008 ntop is now quitting...
It’s just telling you that it does not have the proper permissions to run in the /opt/local/var/ntop/prefsCache.db database.
Go to a web browser, and type:
http://localhost:3000
and you should be able to see an interface something like the following:

ntop running on Mac OS X 10.5.6, Leopard
Need to mount a samba share on your CentOS server from the command line?
Create a directory on the root:
mkdir /sharename
Then mount the share:
mount -t cifs //<servername>/<sharename> /sharename
if you type df -h you should see that your share is now mounted on the mountpoint that you created earlier.